From patchwork Wed Jun 12 11:43:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10989611 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5CE661708 for ; Wed, 12 Jun 2019 11:44:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4A7A9286C6 for ; Wed, 12 Jun 2019 11:44:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3D6A628A33; Wed, 12 Jun 2019 11:44:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DB7CB2894D for ; Wed, 12 Jun 2019 11:44:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438510AbfFLLoO (ORCPT ); Wed, 12 Jun 2019 07:44:14 -0400 Received: from mail-qt1-f201.google.com ([209.85.160.201]:39381 "EHLO mail-qt1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438505AbfFLLoM (ORCPT ); Wed, 12 Jun 2019 07:44:12 -0400 Received: by mail-qt1-f201.google.com with SMTP id o16so14438197qtj.6 for ; Wed, 12 Jun 2019 04:44:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=eb4SnUCHaoFPTU0EqMrx7H6L5ANcvzM3zwsiyq0FV40=; b=UD79Ay48r+Qt/fUB4eQQS+u7jB3BFWRYtdLCt6Qa95VfLfmvvw7Hya/RkyTUwkhx0D +1vmB8M4RBQZbJNIhwkYxv5AEL21ErrNvQCQ8+lOs4BCA4LMOTjJTuV8BlTNIfNEsvvi S8RTYx74gNWKftQMTjEJ+kHo6ZnD8masl8ZG8ezS9xy8uaiMn8te593VaiscKSGKojp2 e5Cc4FqtUoN3q8YTe+OydLtjYtDNOm5Wm5t/bbuGQhbg9sf44AZgifS6zPiIE4WlbsCF 2CX+HbBHE4vO/HCGylKIpSsIsXiK8frsZe8Lb15lkTfFpYP5OsKznhL91S0FrbJQy23X yoqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=eb4SnUCHaoFPTU0EqMrx7H6L5ANcvzM3zwsiyq0FV40=; b=WfcVVc6ShWGsck8PWkW/Lf0ubmAmFknO1m5GhFYU8jAebX4wmXwKhkUcSN14DdJrCB wlQCXsuxfzqWKr5qXSWpJy1bvzmmkwgQuIJzoXr1b1IiQR7cicjfe3TFog+ywwpn4j1l 8o/r6pVd32a3lpXLrirYzSWA4dYALBslGpH68XX679EY+HD+E7akkC2aDozBE02mIg4F Ay1E5OObasAMywz3v9d7H9MlaJbJeEP5rtbB68Mz8/6/NIlQQU34426YlMqaUhUaILVX yKTtwv9rJDwKBqtnY3pn5xbcZ7oLM38AvJ4B7YdZ9MeSN2ucpj1LWbLk4+Bc+1o3oKyW perQ== X-Gm-Message-State: APjAAAV+eNSNHm/Iv+Gr9F4rnKFFsb4Bil5fRI7GfFEE2pUC89IBdC7q gIzhR2UpGpEw70Wb42Vf5ihBk36RlzX23Atp X-Google-Smtp-Source: APXvYqziQbsGJB+s1a1ziaRcl+e8Gmo6MzSM6gFLtwRxsTnl2K0xyr2RS7DkrrH2w0nPz/f56zeYNt9ix1U3jsHZ X-Received: by 2002:ae9:f107:: with SMTP id k7mr2472892qkg.215.1560339851579; Wed, 12 Jun 2019 04:44:11 -0700 (PDT) Date: Wed, 12 Jun 2019 13:43:28 +0200 In-Reply-To: Message-Id: <50293fea168d5252f79ee0bf160c64c72edbf270.1560339705.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.rc2.383.gf4fbbf30c2-goog Subject: [PATCH v17 11/15] IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr From: Andrey Konovalov To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Catalin Marinas , Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Kees Cook , Yishai Hadas , Felix Kuehling , Alexander Deucher , Christian Koenig , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Luc Van Oostenryck , Dave Martin , Khalid Aziz , enh , Jason Gunthorpe , Christoph Hellwig , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. mlx4_get_umem_mr() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- drivers/infiniband/hw/mlx4/mr.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c index 355205a28544..13d9f917f249 100644 --- a/drivers/infiniband/hw/mlx4/mr.c +++ b/drivers/infiniband/hw/mlx4/mr.c @@ -378,6 +378,7 @@ static struct ib_umem *mlx4_get_umem_mr(struct ib_udata *udata, u64 start, * again */ if (!ib_access_writable(access_flags)) { + unsigned long untagged_start = untagged_addr(start); struct vm_area_struct *vma; down_read(¤t->mm->mmap_sem); @@ -386,9 +387,9 @@ static struct ib_umem *mlx4_get_umem_mr(struct ib_udata *udata, u64 start, * cover the memory, but for now it requires a single vma to * entirely cover the MR to support RO mappings. */ - vma = find_vma(current->mm, start); - if (vma && vma->vm_end >= start + length && - vma->vm_start <= start) { + vma = find_vma(current->mm, untagged_start); + if (vma && vma->vm_end >= untagged_start + length && + vma->vm_start <= untagged_start) { if (vma->vm_flags & VM_WRITE) access_flags |= IB_ACCESS_LOCAL_WRITE; } else {